X509CertificateLoader fails to read cat files

[Nuklon]

Description

The now obsoleted ctor works fine when reading cat files, but the new X509CertificateLoader fails to load it and throws "Cannot find the requested object.".

Reproduction Steps

using X509Certificate2 certificate = X509CertificateLoader.LoadCertificateFromFile(path); // throws

Example cat file (taken from latest AMD driver, rename to .cat): example.cat.txt

Expected behavior

Load OK.

Actual behavior

Throws an exception.

Regression?

Yes.

Known Workarounds

Use obsoleted ctor.

Configuration

.NET 9.0 RC2
Windows 11 24H2 x64

Other information

No response

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[jeffhandley]

@bartonjs, as far as I know we didn't consider CAT files to be in scope for the new X509CertificateLoader; is that right? From my understanding, they aren't actually X.509 certificate payloads.

@Nuklon, what data were you extracting from the CAT file via the X509Certificate2 API?

[Nuklon]

@Nuklon, what data were you extracting from the CAT file via the X509Certificate2 API?

The issuer and expiration date.